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Questions related from Jack Denur
Is gravity a force in General Relativity? It is sometimes stated that gravity is not a force in General Relativity: that a particle moves, force-free, along a geodesic in curved spacetime in the...
30 April 2025 4,071 18 View
A Gravitational Energy-Conservation Paradox in General Relativity?, revised draft in light of Max Li’s very thoughtful and detailed analysis of the initial draft Consider Spherical-Shell...
24 March 2025 2,529 2 View
A question concerning algorithmic randomness and the Second Law of Thermodynamics According to the theory of algorithmic randomness, there is no algorithm that can express a totally random...
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Dark matter interacts with ordinary matter (and ordinary energy) via gravity (G), but not via electromagnetism (E), the strong nuclear force (S), or the weak nuclear force (W). But is totally dark...
13 June 2022 1,804 13 View
Some theories of physics require (not merely allow) magnetic monopoles. [See, for example, David J. Griffiths, Introduction to Electrodynamics, Fourth (Kindle) Edition (Cambridge University Press,...
17 November 2021 5,517 6 View
In accordance with the classical limit, the probability per attempt of tunneling decreases towards zero as the mass m of a particle, the deficit V − E between its energy E and the barrier height V...
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I have Scientific WorkPlace 5.5 from MacKichan Software. But after 40 years of providing excellent products and service, MacKichan Software is no longer in business. Are there any other companies...
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Superconductors with respect to electricity manifest zero resistance to electric current. But they are NOT also superconductors with respect to heat. The flip side of electrical superconductivity...
15 August 2020 2,445 7 View
How can a clock inside a spherical shell "know" that it should tick slowly? Unlike Newton's action-at-a-distance theory of gravity (though even Newton himself had reservations about this),...
30 December 2019 235 22 View
